To know that you’d need to be paying attention. Most people are not paying attention, they only remember they had more money back then.
Listen you can either accept that the vast majority of people are simpletons and try to make this out to be more complicated than it is, or you can understand why Trump won and use that to win next elections. Trump won because he understands that they are simpletons and engages them as such.
The only reason I still think they will inevitably fail (although not without a heavy cost to the public) is because of how many different factions there are. Currently they are united by a common hate of liberalism, but if they manage to defeat it they will inevitably turn on each other.
No matter how I slice this I strongly feel that all roads leads to a civil war and a fracturing of the federation.